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O experimento foi realizado para se avaliar o uso de um complexo enzimático (CE) contendo carboidrases na dieta de porcas lactantes e de suas leitegadas. Foram utilizadas 264 fêmeas cruzadas geneticamente homogêneas, que foram bloqueadas pela ordem de parto e distribuídas ao acaso em quatro tratamentos, resultantes de um arranjo fatorial 2x2 (dieta lactação (DL) x dieta pré-inicial (DPI)), com dois níveis cada fator (com e sem CE). Nas porcas, foram avaliados: peso ao desmame (PDESM); variação do peso corporal; espessura de toucinho (ET); variação de ET; escore corporal (EC); consumo de ração (CRF) e composição do leite e nas leitegadas: consumo de ração (CRL); peso da leitegada ao nascer e ao desmame (PLDESM); e peso médio do leitão ao desmame (PMLDESM). Não houve interação significativa entre DL e DPI para nenhuma variável resposta. O PDESM, a ET, a variação de ET, o EC e a composição do leite (teores de gordura, proteína bruta, lactose e matéria seca) das porcas não foram influenciados (P>0,10) pela adição de enzimas na DL e na DPI. O CRF e o CRL não foram influenciados (P>0,10) pelos tratamentos. O PLDESM e o PLMDESM foram significativamente maiores quando as porcas receberam DL suplementada com CE, em comparação àquelas que não receberam CE na dieta (74,6 vs 72,9kg e 6,32 vs 6,47kg, respectivamente). Houve um aumento de 1,7kg no PLDESM e de 0,15kg no PLMDESM (P=0,06 e P=0,07, respectivamente), resultando em um incremento estimado de 2,27kg de peso vivo quando os animais chegam ao peso de abate. Porcas alimentadas com rações suplementadas com complexo enzimático contendo carboidrases apresentam leitegadas mais pesadas ao desmame. This research was conducted to evaluate the effect of adding enzymatic complex (EC) containing carbohydrases to diets for lactating sows and their litters. A total of 264 genetically homogeneous crossbred sows were used. They were blocked by farrowing order and randomly allotted to four treatments, in a 2 x 2 factorial arrangement (lactating diet (LD) x pre-starter diet (PD)), with two levels per factor (with or without EC). The following variables were measured in the sows: weaning weight; weaning weight variation; backfat; backfat variation; body condition; feed consumption and milk composition. The following variables were measured in the litter: feed consumption; post-natal weight; weaning weight; and average weaning weight. No interaction was found among LD and PD for any of the variables studied. Additionally, no effect was observed for either, female weight, backfat, body condition score or milk composition (fat content, crude protein, lactose and dry matter). Litter weaning weight and average litter weaning weight were higher when LD was supplemented with EC in comparison to the piglets from sows fed with diets without EC (74.6 vs 72.9kg and 6.32 vs 6.47kg, respectively). Litters from female fed with CE were 1.7kg heavier at weaning and showed a 0.15kg increase in the average weaning weight (P=0.06; P=0.07, respectively). This resulted in an estimate 2.27kg increase in the body weight at slaughter. Lactating sows fed with diets containing enzymatic complex with carbohydrases had heavier litters at weaning

Enzimas carboidrases na dieta de porcas lactantes e suas leitegadas